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How cancer cells travel to new tissues and take hold

Understanding these astonishing migrations through the human body, known as metastases, could suggest novel treatments

Pursuing the electrical fluid: How scientists discovered the electron

A celebration of 2025 as the International Year of Quantum Mechanics and Science would be remiss without a look at how the carrier of electricity finally yielded its secrets — paving the way to the quantum era

How did eastern North America form?

With many collisions and much crumpling of rock, down the ages. The story holds lessons for how the edges of continents are built and change over time.

Ghost rivers, hidden lakes: The long search for water on Mars

Martian lake beds and deltas reveal the Red Planet’s watery past. But many puzzles remain, scientist Bruce Jakosky says.

For climate and livelihoods, Africa bets big on solar mini-grids

Nigeria is pioneering the development of small, off-grid solar panel installations to bring reliable electricity to remote communities — setting a model for other African countries

It began with a rabbit: Unraveling the mystery of memory

Half a century after the discovery of long-term potentiation, we’re still learning how the brain remembers

Pig organs in people: The future of cross-species transplants

Can genetically modified animals help ease the shortage of organs? After years of research into xenotransplantation, the field is at a turning point — yet risks and ethical issues remain.

Huh? The valuable role of interjections

Utterances like um, wow and mm-hmm aren’t garbage — they keep conversations flowing

Meet the capuchin monkey: Curious, creative and vengeful

UCLA’s Susan Perry has devoted decades to studying the fast-motion life of these New World primates and learning how the young acquire the skills they need to thrive

The teeming life of dead trees

Rotting logs turn out to be vital to forest biodiversity and recycling organic matter

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Moon rocks reveal hidden lunar history

As NASA astronauts aim for landings in 2027, geologists find surprises in recently retrieved samples from the far side

Quiet couples: Alone time together

The right kind of silence can be golden, revitalizing and strengthening a relationship

Return of the California condor

North America’s largest bird disappeared from the wild in the late 1980s. Reintroduction work in the United States and Mexico has brought this huge vulture back to the skies. This is the story of its comeback.

Bringing the hospital into the home

A movement to provide hospital-level care for sick patients in their own beds, in the comfort of familiar surroundings, is growing in the United States — a trend already embraced in some other countries

Why regulating AI is so hard — and necessary

Misinformation, market volatility and more: Faced with the need to mitigate risks that artificial intelligence presents, countries and regions are charting different paths

We are all genetic mosaics

Picture your body: It’s a collection of cells carrying thousands of DNA errors accrued over a lifetime — many harmless, some bad, and at least a few that may be good for you.

When everything in the universe changed

The revolutionary James Webb Space Telescope and next-gen radio telescopes are probing what’s known as the epoch of reionization. It holds clues to the first stars and galaxies, and perhaps the nature of dark matter.

Solving renewable energy’s sticky storage problem

When the Sun doesn’t shine and the wind doesn’t blow, humanity still needs power. Researchers are designing new technologies, from reinvented batteries to compressed air and spinning wheels, to keep energy in reserve for the lean times.

Top science stories of 2024

This record-setting year for heat saw stunning auroras, a map of a brain, a Dengue epidemic, the first look at rocks from the far side of the Moon, an AI energy scramble and more

A devastating nerve disease stalks a mountain village

Neurologists have grappled with a cluster of amyotrophic lateral sclerosis cases in France, where a fondness for a toxic wild mushroom may hold the answer

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